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a nerve is a whitish fiber or bundle of fibers that transmits impulses of sensation to the brain or spinal cord, and impulses from these to the muscles and organs.
the specific effects vary depending on what pollutants enter the environment. sometimes, water pollusion causes an explosion of new plant growth by providing necessary nutrients and foods. other times, it can harm or kill plants by changing growing conditions, such as by raising or lowering the environment's acidity.